6 Effective Ways to Keep Mice Out of Your Home

Mice may look harmless, but once they find their way into your home, they can quickly become a serious nuisance. They contaminate food, chew through wiring and insulation, damage belongings, and may spread bacteria and disease. As temperatures drop, these tiny rodents often seek warmth, making homes and garages the perfect place to nest.

The good news is that with a few simple preventative measures, you can greatly reduce the chances of a mouse infestation. Here’s how to keep your home rodent-free.

Signs You May Have Mice

Mice are experts at staying hidden, especially during the day. However, they often leave behind clues that reveal their presence. Watch for these common signs:

Small, dark droppings that resemble grains of rice
Chewed food packaging or pet food bags
Gnaw marks on wood, plastic, or electrical wiring
Greasy rub marks along walls or baseboards
Nests made from shredded paper, fabric, or insulation
Scratching noises inside walls or ceilings, especially at night
A strong, musty or ammonia-like odor

Spotting these signs early can help prevent a small problem from becoming a larger infestation.

1. Seal Every Possible Entry Point

Mice can squeeze through incredibly small openings—some as small as 6 millimeters (about ¼ inch). Carefully inspect your home’s exterior for cracks, gaps around pipes, vents, windows, and doors.

Seal small openings with caulk, and use steel wool combined with sealant or fine metal mesh for larger gaps. Installing door sweeps and repairing damaged weather stripping can also help keep rodents outside where they belong.

2. Store Food Properly

Food is one of the biggest attractions for mice. Dry goods such as flour, rice, cereal, pasta, sugar, and pet food should be stored in airtight glass, metal, or sturdy plastic containers.

Avoid leaving pet food out overnight, and clean up crumbs and spills promptly. Even small food sources can encourage mice to settle indoors.